object-oriented Programming in PHP: Ways to develop large PHP projects (i)

This article describes object-oriented programming in PHP (Oop,object oriented programming). I will show you how to pass
Use some OOP concepts and PHP techniques to reduce coding and improve quality. Good luck!

The concept of object-oriented programming:
Different authors may say differently, but an OOP language must have the following:

Abstract data types and information encapsulation
Inherited
Polymorphic
The encapsulation is done in PHP by a class:
--------------------------------------------------------------------------------<?php
Class Something {
In an OOP class, the first character is usually uppercase
var $x;
function SetX ($v) {
Method starts with a lowercase word and then uses uppercase letters to separate words, such as Getvalueofarea ()
$this->x= $v;
}
function GetX () {
return $this->x;
}
}
?>--------------------------------------------------------------------------------
Of course you can define your own preferences, but it's best to keep a standard, which is more effective.

Data members are defined in a class using the "var" declaration, which is not typed until the data member is assigned a value. A data member can
To be an integer, an array, an associated array (associative array), or an object.

method is defined as a function form in a class, you should use $this->name when accessing a class member variable in a method, otherwise the
method, it can only be a local variable.

To create an object using the new operator:

$obj =new something;

You can then use the member function to pass:

$obj->setx (5);
$see = $obj->getx ();

In this example, the SETX member function assigns 5 to the member variable X (not the Class) of the object, and then Getx returns its value of 5.

It is not a good OOP habit that you can access data members in the same way as $obj->x=6 through a class reference. I strongly recommend that you pass
method to access a member variable. If you consider a member variable to be unhandled and use the method only through the object handle, you will be a
A good OOP programmer. Unfortunately, PHP does not support declaring private member variables, so bad code is also allowed in PHP.

Inheritance is easy to implement in PHP, just use the Extend keyword.



--------------------------------------------------------------------------------
<?php

Class Another extends something {
var $y;
function Sety ($v) {
$this->y= $v;
}
function GetY () {
return $this->y;
}
}

?>--------------------------------------------------------------------------------
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